Charles,
It was a parts car in a local yard so it didn't have that paperwork. Everything appeared to be a factory install including the "C8" number stamped on the light housing (yes I removed it). I too thought the grommet and wiring holder was a neat find and worth documenting. I can't say they all came this way, but it is one example I thought I would share. I haven't checked the FAM yet, I guess I should do that.
Danny